CN112680676A - Homogenization heat treatment process of alloy - Google Patents
Homogenization heat treatment process of alloy Download PDFInfo
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- CN112680676A CN112680676A CN202011445404.3A CN202011445404A CN112680676A CN 112680676 A CN112680676 A CN 112680676A CN 202011445404 A CN202011445404 A CN 202011445404A CN 112680676 A CN112680676 A CN 112680676A
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Abstract
The invention discloses a homogenizing heat treatment process of an alloy, which comprises the following steps: obtaining an alloy ingot; and performing at least primary homogenization heat treatment and secondary homogenization heat treatment on the alloy ingot. The homogenization heat treatment process of the alloy provided by the invention can effectively improve the plasticity of the alloy, improve the strength of the alloy and finally improve the processing performance and the service performance of the alloy by adopting at least two-stage homogenization heat treatment.
Description
Technical Field
The invention relates to the field of alloy heat treatment methods, in particular to a homogenization heat treatment process of an alloy.
Background
The alloy has dendrite segregation during solidification, components are not uniformly distributed in a crystal boundary and a crystal, and the nonuniformity of chemical components and structures in an ingot crystal must be eliminated or reduced through homogenization heat treatment. The homogenizing heat treatment can promote the low-melting-point dissoluble eutectic phase in the alloy to be completely or nearly completely dissolved, reduce the volume percentage of the second phase, ensure that the chemical components of the alloy ingot tend to be uniformly distributed, the structure reaches or is close to a balanced state, improve the solid solubility of alloy elements in a matrix, improve the plasticity of the alloy, improve the strength of the alloy and finally improve the processing performance and the service performance of the alloy.
In the prior art, for the homogenization heat treatment of the 2024 alloy, a single-stage homogenization is generally adopted, namely, the heating temperature is 490-500 ℃, and the heat preservation is 24 hours, and the mechanical property of the rolled sheet of the 2024 alloy subjected to the single-stage homogenization heat treatment in the prior art is about 7, so that the mechanical property of the rolled sheet cannot meet the standard requirement.
Therefore, how to effectively improve the mechanical properties of the rolled sheet material of the 2024 alloy is a technical problem which needs to be solved by those skilled in the art at present.
Disclosure of Invention
The invention aims to provide a homogenizing heat treatment process of an alloy, which is used for improving the tensile strength of a 2024 alloy plate and improving the processing performance and the service performance.
In order to achieve the purpose, the invention provides the following technical scheme:
a homogenizing heat treatment process of an alloy comprises the following steps:
obtaining an alloy ingot;
and performing at least primary homogenization heat treatment and secondary homogenization heat treatment on the alloy ingot.
Preferably, the alloy ingot is a 2024 alloy ingot, a 212 alloy ingot or a 2124 alloy ingot.
Preferably, after the step of performing at least a first-stage homogenization heat treatment and a second-stage homogenization heat treatment on the alloy ingot, the method further comprises the following steps: and rolling the alloy ingot into a plate.
Preferably, the temperature of the first-stage homogenization heat treatment is 420-450 ℃, and the heat preservation time is 6-10 hours.
Preferably, the temperature of the first-stage homogenization heat treatment is 430-440 ℃, and the heat preservation time is 7.5-8.5 hours.
Preferably, the temperature of the second-stage homogenization heat treatment is 492-506 ℃, and the heat preservation time is 26-34 hours.
Preferably, the temperature of the second-stage homogenization heat treatment is 496-502 ℃, and the heat preservation time is 28-32 hours.
The invention provides a homogenizing heat treatment process of an alloy, which comprises the following steps: obtaining an alloy ingot; and performing at least primary homogenization heat treatment and secondary homogenization heat treatment on the alloy ingot. The homogenization heat treatment process of the alloy provided by the invention can effectively improve the plasticity of the alloy, improve the strength of the alloy and finally improve the processing performance and the service performance of the alloy by adopting at least two-stage homogenization heat treatment.
In a preferred embodiment, the temperature of the second-stage homogenization heat treatment is 492-506 ℃, and the holding time is 26-34 hours. By the arrangement, the crystallization precipitated phase can be promoted to be dissolved back by improving the homogenization temperature and time in the prior art, and the solid solubility of the alloy elements in the matrix is effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of one embodiment of a homogenization heat treatment process for an alloy provided by the present invention;
FIG. 2 is a flow chart of another embodiment of the homogenization heat treatment process for the alloy provided by the invention.
Detailed Description
The core of the invention is to provide a homogenizing heat treatment process of the alloy, which is used for improving the tensile strength of the 2024 alloy plate and improving the processing performance and the service performance.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 and 2, fig. 1 is a flow chart of an embodiment of a homogenization heat treatment process for an alloy provided by the invention; FIG. 2 is a flow chart of another embodiment of the homogenization heat treatment process for the alloy provided by the invention.
In this embodiment, the homogenization heat treatment process of the alloy comprises the following steps:
step S1: obtaining an alloy ingot;
step S2: and performing at least primary homogenization heat treatment and secondary homogenization heat treatment on the alloy ingot.
The homogenization heat treatment process of the alloy provided by the invention can effectively improve the plasticity of the alloy, improve the strength of the alloy and finally improve the processing performance and the service performance of the alloy by adopting at least two-stage homogenization heat treatment.
Further, the alloy ingot is preferably a 2024 alloy ingot, a 212 alloy ingot or a 2124 alloy ingot, and an alloy ingot having a composition similar thereto.
In addition to the above embodiments, the method further includes, after at least the first-stage homogenization heat treatment and the second-stage homogenization heat treatment of the alloy ingot: the alloy cast ingot is rolled into a plate, and the plate is rolled into a steel plate after the alloy cast ingot is subjected to at least two-stage homogenization heat treatment, so that the plate is convenient to use later.
On the basis of the above embodiments, the temperature of the first-stage homogenization heat treatment is 420-450 ℃, and the heat preservation time is 6-10 hours. Preferably, the temperature of the first-stage homogenization heat treatment is 430-440 ℃, the heat preservation time is 7.5-8.5 hours, and the heat preservation time is most preferably 8 hours.
On the basis of the above embodiments, the temperature of the second-stage homogenization heat treatment is 492-506 ℃, and the heat preservation time is 26-34 hours. Preferably, the temperature of the second-stage homogenization heat treatment is 496-502 ℃, the heat preservation time is 28-32 hours, and the heat preservation time is most preferably 30 hours.
Example one
The homogenization heat treatment process of the alloy provided by the embodiment comprises the following steps:
step S1: obtaining an alloy ingot;
step S2: performing at least primary homogenization heat treatment and secondary homogenization heat treatment on the alloy ingot;
step S3: the temperature of the first-stage homogenization heat treatment is 420-;
step S4: the temperature of the second-stage homogenization heat treatment is 492-506 ℃, and the heat preservation time is 26-34 hours.
Example two
Step S1: obtaining a 2024 alloy ingot;
step S2: performing at least primary homogenization heat treatment and secondary homogenization heat treatment on the alloy ingot;
step S3: the temperature of the first-stage homogenization heat treatment is 430-440 ℃, and the heat preservation time is 7.5-8.5 hours;
step S4: the temperature of the second-stage homogenization heat treatment is 496-502 ℃, and the heat preservation time is 28-32 hours.
EXAMPLE III
Step S1: obtaining a 2024 alloy ingot;
step S2: performing at least primary homogenization heat treatment and secondary homogenization heat treatment on the alloy ingot;
step S3: the temperature of the first-stage homogenization heat treatment is 430-440 ℃, and the heat preservation time is 8 hours;
step S4: the temperature of the second-stage homogenization heat treatment is 496-502 ℃, and the heat preservation time is 30 hours.
The homogenization heat treatment process of the alloy provided by the embodiment is mainly applied to the treatment of 2024 alloy cast ingots, and by adding the first-stage homogenization heat treatment and controlling the precipitation of Mn-containing dispersed phases at low temperature, the size of the alloy is smaller, the number of the alloy is more, the distribution of the Mn-containing dispersed phases is more uniform, the alloy is beneficial to inhibiting recrystallization, and the alloy has a positive effect on improving the strength of plates; the first-stage homogenization heat treatment is equivalent to single homogenization heat treatment in the prior art, and by increasing the homogenization temperature and time, the crystal precipitated phase can be promoted to be redissolved, the solid solubility of alloy elements in a matrix is effectively improved, the plasticity of the alloy is improved, the strength of the alloy is improved, and the processing performance and the service performance of the alloy are finally improved.
The homogenization heat treatment process of the alloy provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (7)
1. The homogenizing heat treatment process of the alloy is characterized by comprising the following steps of:
obtaining an alloy ingot;
and performing at least primary homogenization heat treatment and secondary homogenization heat treatment on the alloy ingot.
2. The process of claim 1, wherein the alloy ingot is a 2024 alloy ingot, a 212 alloy ingot, or a 2124 alloy ingot.
3. The process of claim 1, wherein said step of subjecting said alloy ingot to at least a first and a second heat homogenization treatment further comprises: and rolling the alloy ingot into a plate.
4. The process of claim 1, wherein the first-stage homogenization heat treatment is carried out at a temperature of 420-450 ℃ for a period of 6-10 hours.
5. The homogenizing heat treatment process of alloy according to claim 4, characterized in that the temperature of the first-stage homogenizing heat treatment is 430-440 ℃, and the holding time is 7.5-8.5 hours.
6. The homogenizing heat treatment process for alloy according to any of claims 1 to 5, characterized in that the temperature of the second stage homogenizing heat treatment is 492-506 ℃ and the holding time is 26-34 hours.
7. The process of claim 6, wherein the temperature of the second stage of the homogenization heat treatment is 496-502 ℃ and the holding time is 28-32 hours.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105803280A (en) * | 2016-04-25 | 2016-07-27 | 山东南山铝业股份有限公司 | Damage resisting tolerance high-strength aluminum alloy plate and preparation method thereof |
| CN106521197A (en) * | 2016-11-16 | 2017-03-22 | 山东南山铝业股份有限公司 | Aviation aluminum alloy and production technology thereof |
| CN109266923A (en) * | 2018-11-28 | 2019-01-25 | 中铝材料应用研究院有限公司 | A kind of high-intensitive, high fatigue life Al-Cu-Mg-Si-Mn line aluminium alloy and its processing method |
-
2020
- 2020-12-11 CN CN202011445404.3A patent/CN112680676A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105803280A (en) * | 2016-04-25 | 2016-07-27 | 山东南山铝业股份有限公司 | Damage resisting tolerance high-strength aluminum alloy plate and preparation method thereof |
| CN106521197A (en) * | 2016-11-16 | 2017-03-22 | 山东南山铝业股份有限公司 | Aviation aluminum alloy and production technology thereof |
| CN109266923A (en) * | 2018-11-28 | 2019-01-25 | 中铝材料应用研究院有限公司 | A kind of high-intensitive, high fatigue life Al-Cu-Mg-Si-Mn line aluminium alloy and its processing method |
Non-Patent Citations (1)
| Title |
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| 李念奎等: "《铝合金材料及其热处理技术》", 30 April 2012, 冶金工业出版社 * |
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Application publication date: 20210420 |